Ehrlich, P. R., Ehrlich, A. H., & Holdren, J. P. (1977). Ecoscience: Population, resources, environment. W. H. Freeman.
Chicagoスタイル(17版)引用形式Ehrlich, Paul R., Anne H. Ehrlich, , John P. Holdren. Ecoscience: Population, Resources, Environment. San Francisco: W. H. Freeman, 1977.
MLA(9版)引用形式Ehrlich, Paul R., et al. Ecoscience: Population, Resources, Environment. W. H. Freeman, 1977.
警告: この引用は必ずしも正確ではありません.